Here we see a glowing object the is orb like in appearance and directly behind what NASA calls Comet ISON, but I call it a group of UFOs.

The UFO in its tail has a coloration that matches that of the comet on purpose so that it can blend in with the comets tail and not be seen by primitive civilisations...  namely us.

Date of discovery: October 4, 2013
Location of discovery: Comet ISON heading toward Earth